Bell Faction Paul Frank, £35, www.bellsports.com

This is a scaled-down version of the skate-styled adult Faction bike helmet — what the cool kids wear. Bell have teamed up with American cartoonist and fashion designer Frank for a range of lids featuring his unique artwork — this one features Julius the Monkey, one of his best-known characters. The helmet has a tough plastic shell, to protect it from inevitable scuffs, bonded to a standard dual-density EPS foam inner. Despite its look it is lightweight and has 12 vents to keep heads cool. Plenty of padding and an adjustable strap keep it in place.